Abstract: A fixing device includes a fixing member, a pressure member, and a guiding member. The guiding member includes a first guide surface, a second guide surface, and a pair of third guide surfaces consecutively installing both end portions in the axial direction of the first guide surface and both end portions in the axial direction of the second guide surface. The first end edge of the first guide surface has a first circular arc shape arranged such that a center portion in the axial direction projects toward the downstream side in the rotation direction with respect to both end portions in the axial direction. The second guide surface is one of a curved surface in a second circular arc shape arranged such that a center portion in the axial direction is close to the first circumference surface with respect to both end portions in the axial direction.

Abstract: A fixing device includes a fixing member, a pressure member, and a guiding member. The guiding member includes a first guide surface, a second guide surface, and a pair of third guide surfaces consecutively installing both end portions in the axial direction of the first guide surface and both end portions in the axial direction of the second guide surface. The first end edge of the first guide surface has a first circular arc shape arranged such that a center portion in the axial direction projects toward the downstream side in the rotation direction with respect to both end portions in the axial direction. The second guide surface is one of a curved surface in a second circular arc shape arranged such that a center portion in the axial direction is close to the first circumference surface with respect to both end portions in the axial direction.

Abstract: In a sheet feeding cassette (10), wall portions (25a to 25d) are provided upright at four peripheral end portions of a cassette base (25). Of the wall portions (25a to 25d), the wall portion (25a) positioned on a downstream side in a sheet feeding direction has a first notch portion (41) formed at a substantially center portion in a longitudinal direction of the wall portion (25a), the first notch portion (41) facing a feeding roller (30a) provided on an image forming apparatus (100) main body side.

Abstract: In a sheet feeding cassette (10), wall portions (25a to 25d) are provided upright at four peripheral end portions of a cassette base (25). Of the wall portions (25a to 25d), the wall portion (25a) positioned on a downstream side in a sheet feeding direction has a first notch portion (41) formed at a substantially center portion in a longitudinal direction of the wall portion (25a), the first notch portion (41) facing a feeding roller (30a) provided on an image forming apparatus (100) main body side.

Abstract: Disclosed is a scanning optical module, which includes a light source, a rotatable multifaceted mirror adapted to scanningly deflect a scanning beam emitted from the light source, in a given direction, a driving device adapted to drivingly rotate the rotatable multifaceted mirror through a shaft thereof, a plate-shaped member formed with a driving device-mounting portion mounting thereto the driving device in such a manner as to absorb heat generated in the shaft, an air blower adapted to generate an airstream, and an airstream passage-defining member adapted to direct the airstream from the air blower, toward the driving device-mounting portion of the plate-shaped member.

Abstract: A drive unit includes a motor being a drive source, a velocity reduction gear for reducing the revolution of the motor, an output shaft for connecting the velocity reduction gear to the rotation shaft of a photosensitive drum, and a velocity detection mechanism including an encoder and sensor members and detecting the revolution of the output shaft. The velocity reduction gear and the velocity detection mechanism are placed in a unit housing including a housing body made of a resin with one end opened and a support plate made of metal closing the opening of the housing body, and the output shaft is rotatably supported by the housing body and the support plate.

Abstract: Disclosed is a scanning optical module, which includes a light source, a rotatable multifaceted mirror adapted to scanningly deflect a scanning beam emitted from the light source, in a given direction, a driving device adapted to drivingly rotate the rotatable multifaceted mirror through a shaft thereof, a plate-shaped member formed with a driving device-mounting portion mounting thereto the driving device in such a manner as to absorb heat generated in the shaft, an air blower adapted to generate an airstream, and an airstream passage-defining member adapted to direct the airstream from the air blower, toward the driving device-mounting portion of the plate-shaped member.